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Old 12-27-2008, 10:11 PM   #1
Kountersteer
Scooby Newbie
 
Member#: 198529
Join Date: Dec 2008
Chapter/Region: E. Canada
Location: Canada
Vehicle:
'07 2.5i
Garnet Red Pearl

Question '07 2.5i... Where do I start?

Just bought 2007 my 2.5i base wagon, my first subie and man do I love it! I would like some input on adding 30-50 hp the most efficiant way $- wise with reliability and keeping it naturaly aspirated, or is that not possible???

Advice plse
Thks
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Old 12-27-2008, 10:20 PM   #2
cmiovino
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Member#: 134005
Join Date: Dec 2006
Chapter/Region: MAIC
Location: Pittsburgh, PA
Vehicle:
2004 WRX Premium
PSM

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http://www.rs25.com/forums/showthread.php?t=80104

^ my guide

For 30-50HP, you're going to need a full exhaust, intake, then cams too. I'd start with intake and exhaust first.

But follow the guide. I didn't post cams there, but they would go last.

Good luck.
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Old 12-27-2008, 10:23 PM   #3
Retiarius
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Join Date: Dec 2008
Location: Coppell, TX
Vehicle:
2002 WRX

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I believe there was a company that spent $20k upgrading a 2.5RS in order to get it barely past stock 2.0L WRX level. There is no cost effective way to add 50 hp to a 2.5i aside from nitrous.
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Old 12-27-2008, 10:24 PM   #4
chazly413
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Member#: 151079
Join Date: Jun 2007
Chapter/Region: MAIC
Location: College Park, MD
Vehicle:
2005 2.5RS RBP
too many friction losses

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I would advise doing handling mods. That's the cheapest, easiest, most reliable way to get fun out of your car.

If you still want 30-50 horsepower, though, head on over to the Normally Aspirated forum.
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Old 12-27-2008, 10:53 PM   #5
Kountersteer
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Member#: 198529
Join Date: Dec 2008
Chapter/Region: E. Canada
Location: Canada
Vehicle:
'07 2.5i
Garnet Red Pearl

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Great, thanks guys.
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Old 12-28-2008, 09:54 AM   #6
just_an_impreza
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Member#: 135885
Join Date: Dec 2006
Chapter/Region: MWSOC
Location: Fort Wayne, IN
Vehicle:
2018 WRX
Pearl White

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+30 horse = a quality exhaust and intake *might* get you close

+50 horse = you should have bought a WRX
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